Granted Patent
Utility
US 4,370,141 · App. 06/264,741
Process for the thermal stabilization of acrylic fibers
Inventors:
Shu-Mei Lee, Donald M. Gezovich
Patented Case
View Patent ↗
Granted: Jan 25, 1983
Filed: May 18, 1981
Inventors
Shu-Mei Lee
Donald M. Gezovich
Assignee (at issue)
Celanese GmbH
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.